Asymmetric inductive peaking for optoelectronic devices

Details Asymmetric inductive peaking for optoelectronic devices Asymmetric inductive peaking for optoelectronic devices

1998-09-18

2000-05-02

Epps, Georgia

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359237, 359238, 385 14, 372 38, G02F 103, G02B 2600, G02B 612, H01S 300

Patent

active

060579544

ABSTRACT:
An optoelectronic device, such as an electro-absorption modulator laser (EML), is configured to a submount using an asymmetric inductive peaking scheme in which a first wire connects a modulator signal electrode on the submount to the modulator contact pad on the device and a second wire connects the modulator contact pad to an integrated resistor on the submount, where the first and second wires have substantially different inductances. Such asymmetric inductive peaking improves the high-frequency performance of the resulting packaged device by providing a higher transmission coefficient and a lower return loss at high frequencies than devices configured using conventional symmetric inductive peaking in which the inductances of the two connecting wires are purposely designed to be equal. In one embodiment, in which the device will be modulated by a standard 50-ohm electrical signal generator, the integrated resistor is a 50-ohm device, the first wire is kept as short as practicable (e.g., about 0.3 mm) and the second wire is made as long as practicable (e.g., about 1.5 mm). The resulting packaged devices show good high-frequency performance for a wide range of device parameters.

REFERENCES:
patent: 5602672 (1997-02-01), Ishimura et al.
patent: 5781578 (1998-07-01), Takagi

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